Re: udev and dbus

[Kay Sievers <kay.sievers@vrfy.org>]

On Thu, 2004-03-11 at 18:30, David Zeuthen wrote:
> On Thu, 2004-03-11 at 18:23, Kay Sievers wrote:
> > > > This I would recommend against - not every hotplug event makes udev
> > > > create/remove a device node; networking devices are one example. 
> > > 
> > > Zero argument! You want udev to call scripts for a device it doesn't
> > > handle itself, with a empty NODES environment? That's definitely nothing
> > > more than misuse of infrastructure.
> > 
> > Oh, seems like I did get you wrong? Sorry.
> > Nevermind, dbus installs it's own hotplug script independend of the udev
> > dbus connection. 
> 
> Actually it's hal that installs a hotplug script of it's own and hal
> just happens to use dbus as the transport; this could be another IPC
> construct.
> 
> > So maybe these both scripts may be combined into one?
> > 
> 
> This would require that the udev hotplug script runs before the hal
> hotplug script which a) isn't the case today; and b) I'm not sure that
> it's wise to rely on which order the scripts run in; that would, for
> instance, make it hard to parallelize hotplug events sometime in the
> future.

Sure, you can execute events for different devpathes in parallel, like
we do today. But you should have control over the order of script
execution for a single event.

Kay



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